 Every castle needed for its maintenance a group of skilled artisans, and the lords wished to draw to the castle gates all kinds of commodities for the castle's provision.The strength of the garrison made the neighbourhood of the castle a place of danger to men unprotected by legal privilege; and to invite to its neighbourhood desirable settlers, legal privileges similar to those enjoyed in Norman or English boroughs were guaranteed to those who would build on the plots which were offered to colonists.A low fixed rental, release from the renders required of villeins, release from the jurisdiction of the castle, and the creation of a separate borough jurisdiction, with or without the right to choose their own officers, rules fixing the maximum of fees and fines, or promising assessment of the fines by the burgesses themselves, the cancelling of all the castellan's rights, especially the right to take a forced levy of food for the castle from all within the area of his jurisdiction, freedom from arbitrary tallage, freedom of movement, the right to alienate property and devise land, these and many other privileges named in the early seignorial charters were what constituted the Norman liber burgus of the seignorial type.